I believe that every human has a finite number of heartbeats. I don't intend to waste any of mine running around doing exercises.

First On The Moon : A Voyage with Neil Armstrong, Michael Collins, Edwin E Aldrin, Jr. (1970) edited by Gene Farmer and Dora Jane Hamblin, p. 113, states of this: "Like many a quote which gets printed once and therefore enshrined in the libraries of all newspapers and magazines, this particular one was erroneous. Neil recalled having heard the quote, and he even recalled having repeated it once. He did not subscribe to its thesis, however, and he only quoted it so that he could disagree with it."